B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
B21D 9/04 (2006.01) B21D 11/00 (2006.01)
Patent
CA 2158539
A pipe bending machine is described which utilizes a cord and lattice support structure having a first end, a second end, an interior lattice framework and an exterior connecting cord which connects the periphery of the interior lattice framework. Pipe securing tie backs are secured to the support structure adjacent each of the first end and the second end. At least one pressure exerting hydraulic cylinder is secured to the support structure intermediate the first end and the second end. The hydraulic cylinder has a pressure member movable in relation to the support structure thereby exerting a bending force upon a pipe held by the pipe securing means. The bending force places the interior lattice framework in compression and the connecting cord in tension. The forces of compression and tension being off-setting thereby enabling the support structure to withstand the bending force. The cord and lattice support structure, as described, enables the pipe bending machine to be made light enough to be carried by one man to remote locations along a pipeline right of way or other such construction sites.
Heaman Norman Laverne
Woodruff Nathan V.
LandOfFree
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